WO2019087882A1

WO2019087882A1 - Liquid temperature adjustment apparatus and temperature adjustment method using same

Info

Publication number: WO2019087882A1
Application number: PCT/JP2018/039433
Authority: WO
Inventors: 克次内野; 康宏猶原
Original assignee: 伸和コントロールズ株式会社
Priority date: 2017-10-30
Filing date: 2018-10-24
Publication date: 2019-05-09
Also published as: CN111316046A; TW201923295A; JP6884387B2; TWI794317B; KR102290252B1; CN111316046B; US20210116150A1; JP2019082280A; KR20200007818A

Abstract

A liquid temperature adjustment apparatus 1 is provided with: a refrigeration device 10 having a refrigeration circuit 16 in which a compressor 11, a condenser 12, a first expansion valve 13, and a first evaporator 14 are connected in this order so as to circulate a heat medium through piping, and having an injection circuit 17 that, in the refrigeration circuit 16, branches out at a part downstream of the compressor 11 but upstream of the condenser 12 and that is connected to a part downstream of the first expansion valve 13 but upstream of the first evaporator 14; and a first liquid supply device 100 that circulates a first liquid. The injection circuit 17 has a flowrate adjustment valve 17A for adjusting the flowrate of the heat medium to be circulated. The first liquid circulated by the first liquid supply device 100 is cooled by the first evaporator 14.

Description

Liquid temperature control device and temperature control method using the same

The present invention regulates the temperature of a liquid by a refrigeration apparatus having a compressor, a condenser, an expansion valve, and an evaporator, and supplies the liquid to the temperature control target side, and a temperature regulation method using the same. About.

A liquid temperature control device is known that includes a refrigeration system having a compressor, a condenser, an expansion valve, and an evaporator, and a circulation system that circulates a liquid such as brine, and cools the liquid of the circulation system by the evaporator of the refrigeration system. For example, JP2015-14417A. In this type of liquid temperature control device, a heater is usually provided in the circulation device, and the liquid is cooled by the evaporator and then heated by the heater to adjust the temperature of the liquid to be circulated to the desired temperature with high accuracy. can do.

Some of the liquid temperature control devices as described above include a discharge type liquid supply device instead of the circulation device (recirculation liquid supply device). In this type of liquid temperature control apparatus, the liquid flowing through the liquid supply device is cooled by the evaporator, and then the liquid is discharged from the liquid supply device to the temperature control target side. This type of liquid temperature control apparatus may be used, for example, when cleaning a temperature controlled object simultaneously with temperature control of the temperature controlled object.

In a liquid temperature control apparatus provided with such a discharge type liquid supply apparatus, the liquid discharged by the liquid supply apparatus tends to be large in volume, and tap water, pure water generated from tap water, and a large tank are used as the liquid. May use water stored in the

The temperature of tap water changes relatively largely depending on the environmental change, and the temperature of water stored in the large tank also changes relatively largely according to the environmental change when the temperature control device is not attached to the tank. In addition, tap water and water stored in a large tank are usually not adjusted in temperature before being drawn into the liquid supply device. Therefore, in the liquid temperature control apparatus using a liquid such as tap water in the discharge type liquid supply apparatus, the refrigeration required to heat the liquid to the target temperature according to the fluctuation of the liquid temperature before the temperature control. Situations can occur where the capacity or heating capacity fluctuates significantly.

As measures when the above situation occurs, adjustment of the heating capacity of the heater on the liquid supply device side, adjustment of the opening degree of the expansion valve on the refrigeration device side, and adjustment of the rotational speed of the compressor can be mentioned.

However, the adjustment of the heating capacity of the heater is lacking in responsiveness, and if it is intended to output a large heating capacity, the power consumption increases and the running cost may be excessively increased. In addition, when attempting to widen the output range of the heating capacity, there is a possibility that the manufacturing cost may be excessively increased.

On the other hand, the adjustment of the opening degree of the expansion valve can not adjust the refrigeration capacity over a wide range, and it is difficult to sufficiently cope when the temperature fluctuation of the liquid to be temperature-controlled is large. Further, the adjustment of the rotational speed of the compressor is likely to disturb the behavior of the heat medium after the adjustment of the rotational speed and to cause disturbance easily, so it takes a long time to output a stable refrigeration capacity and lacks quick response.

The present invention has been made in consideration of the above-mentioned circumstances, and even when the temperature of the liquid introduced to adjust the temperature can be greatly fluctuated, the temperature of this liquid can be rapidly reduced while suppressing the manufacturing cost and the running cost. Further, it is an object of the present invention to provide a liquid temperature adjusting device capable of adjusting the temperature to the target temperature accurately and a temperature adjusting method using the same.

The liquid temperature control apparatus according to the present invention includes a refrigeration circuit in which a compressor, a condenser, a first expansion valve, and a first evaporator are connected by piping in this order to circulate a heat medium, and the refrigeration circuit An injection circuit branched from the downstream side of the compressor and the upstream side of the condenser and connected to the downstream side of the first expansion valve and the upstream side of the first evaporator Device, and a first liquid supply device for flowing the first liquid, the injection circuit having a flow control valve for adjusting the flow rate of the heat medium to be flowed, the first liquid supply device Cooling the first liquid flowing therethrough by the first evaporator.

In this liquid temperature control device, the high-temperature heat medium flowing out of the compressor can be supplied to the downstream portion of the first expansion valve and the upstream portion of the first evaporator via the injection circuit, The flow rate of the supplied heat medium can be adjusted by the flow control valve. This makes it possible to adjust the refrigeration capacity output in the first evaporator over a wide range. Further, the temperature of the heat medium flowing into the first evaporator can be changed by adjusting the mixing ratio of the high temperature heat medium to the low temperature heat medium, and the first evaporator can be increased by increasing the mixing amount of the high temperature heat medium. The temperature of the heat transfer medium flowing into the first heat exchanger rapidly increases, and the temperature of the heat transfer medium flowing into the first evaporator decreases rapidly by reducing the mixing amount of the high temperature heat transfer medium. By adjusting the temperature of the heat medium and adjusting the refrigeration capacity without adjusting the number of revolutions of the compressor, the desired refrigeration capacity can be obtained quickly and accurately. In addition, since the adjustment of the refrigeration capacity is performed not using additional power supply but using a part of the heat medium circulating in the refrigeration circuit, the manufacturing cost and the running cost can be suppressed. Therefore, even if the temperature of the liquid (first liquid) introduced to adjust the temperature can fluctuate significantly, the temperature of this liquid (first liquid) can be rapidly determined while suppressing manufacturing costs and running costs. The temperature can be adjusted to the target temperature with high accuracy.

The first liquid supply device may be a discharge type liquid supply device that releases the first liquid supplied from a liquid supply source after temperature adjustment.

Further, the liquid supply source is a water supply, and the first liquid is tap water, or the liquid supply source stores the first liquid and warms the first liquid to be stored. It may be a tank having no adjusting device.
Further, the first liquid may be pure water generated from tap water.

When a discharge-type liquid supply device is used in this kind of liquid temperature control device, the amount of liquid released from the liquid supply device tends to be large, and in many cases, tap water supplied from the water as a liquid Water stored in large tanks is used. At this time, the temperature of the tap water and the water stored in the large tank is not usually adjusted before being drawn into the liquid supply device. Therefore, in the case where the first liquid supply device is a discharge type liquid supply device, and further in the case where the liquid supply source for the first liquid supply device is a water supply or a tank not having a device for controlling the temperature of stored liquid, The liquid temperature adjusting device according to the present invention can adjust the temperature of the liquid (first liquid) to the target temperature quickly and accurately while suppressing the manufacturing cost and the running cost particularly effectively.
In addition, water supply means the facility which supplies water, and tap water means the water supplied from water supply. For example, the water supply may be a water supply managed by a country or a local public entity or the like, and the tap water may be water supplied from the water supply, which has been cleaned to meet a specific standard.
Further, pure water means high purity water produced through a cleaning process using an ion exchange resin or the like. When pure water is produced from tap water, the pure water means tap water in a broad sense. Therefore, when it is said that the liquid supply source is tap water and the first liquid is pure water produced from tap water, pure water means water produced from tap water through a pure water producing apparatus. Do.

Further, the refrigeration apparatus branches from the downstream side of the condenser and the upstream side of the first expansion valve in the refrigeration circuit, and is downstream of the first evaporator and upstream of the compressor. It further has a parallel pipe connected to the part, and the parallel pipe is provided with a second expansion valve and a second evaporator in this order, and in the refrigeration apparatus, the heat medium is the compressor, the condensation, , The second expansion valve, and the second evaporator may be circulated in this order.

In this case, the second evaporator enables temperature control of a fluid different from the first liquid, that is, a liquid or gas different from the first liquid. Thereby, a plurality of temperature control objects can be efficiently temperature-controlled using a single refrigeration apparatus.

Further, the liquid temperature control device according to the present invention further includes a second liquid supply device that allows the second liquid to flow, and the second evaporator is configured to allow the second liquid to flow through the second liquid supply device. It may be cooled by
At this time, the second liquid supply device may be a circulation type liquid supply device that circulates the second liquid.

In this case, two liquids can be efficiently temperature-controlled using a single freezing apparatus. For example, when one liquid is introduced for temperature control with a large temperature fluctuation, and the other liquid is introduced for temperature control with a small temperature fluctuation, one liquid may be used as a first evaporator. By cooling the other liquid by the second evaporator, it is possible to realize the desired temperature control by the two liquids while effectively reducing the manufacturing cost. In this case, an injection circuit for supplying a high-temperature heat medium is not provided between the second expansion valve and the second evaporator.
More specifically, in general, since the temperature fluctuation of the liquid circulated after the temperature control of the temperature control target tends to be small in the circulation type liquid supply device, the second liquid supply device is a circulation type liquid supply device If so, the second liquid supplied to the second liquid supply device may be cooled by the second evaporator. In this case, it is possible to realize the desired temperature control with the two liquids while particularly effectively suppressing the manufacturing cost.

In addition, the second liquid supply device may have a heater for heating the second liquid.

In this case, even if a situation occurs in which the refrigeration capacity in the second evaporator decreases to a desired value due to the supply of the high-temperature heat transfer medium from the injection circuit, the heating capacity of the heater is compensated to compensate for this reduction. By lowering it, it is possible to maintain the desired temperature control state for the second liquid. In this case, it is necessary to always output a predetermined heating capacity to the heater.

Further, in the temperature control method using the liquid temperature control device according to the present invention, the liquid temperature control device is
A refrigeration circuit in which a compressor, a condenser, a first expansion valve, and a first evaporator are connected by piping in this order to circulate a heat medium, and the condenser downstream of the compressor in the refrigeration circuit A refrigeration system having an injection circuit branched from the upstream side of the first expansion valve and connected to the downstream side of the first expansion valve and the upstream side of the first evaporator;
A first liquid supply device through which the first liquid flows;
A second liquid supply device for passing a second liquid,
The refrigeration apparatus branches from the downstream side of the condenser and the upstream side of the first expansion valve in the refrigeration circuit, and is downstream of the first evaporator and upstream of the compressor. With parallel piping connected,
The parallel piping is provided with a second expansion valve and a second evaporator in this order,
In the refrigeration apparatus, the heat medium is also circulated in the order of the compressor, the condenser, the second expansion valve, and the second evaporator.
The injection circuit has a flow control valve that controls the flow rate of the heat medium to be flowed.
The first liquid supply device is a discharge type liquid supply device that releases the first liquid supplied from a liquid supply source after temperature control,
The second liquid supply device is a circulation type liquid supply device that circulates the second liquid,
The first liquid supplied by the first liquid supply device is cooled by the first evaporator, and the second liquid supplied by the second liquid supply device is cooled by the second evaporator. It has become
The temperature control method is
Cooling and cleaning the workpiece to be cut by a cutting tool and its surrounding area with the first liquid cooled by the first evaporator;
Cooling the drive of the cutting tool with the second liquid cooled by the second evaporator.

According to this temperature control method, it is possible to cool the work to be cut by the cutting tool and the peripheral area thereof economically and also to cool the driving unit of the cutting tool.

According to the present invention described above, even when the temperature of the liquid introduced to adjust the temperature can be greatly varied, the temperature of the liquid can be quickly and accurately controlled while suppressing the manufacturing cost and the running cost. The temperature can be adjusted.

It is the schematic of the liquid temperature control apparatus concerning the 1st Embodiment of this invention. It is the schematic of the liquid temperature control apparatus concerning the 2nd Embodiment of this invention. It is the schematic of the liquid temperature control apparatus concerning the 3rd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First Embodiment
FIG. 1 is a schematic view of a liquid temperature adjusting device 1 according to a first embodiment of the present invention. As shown in FIG. 1, the liquid temperature adjustment device 1 according to the present embodiment includes a heat pump type refrigeration device 10, a first liquid supply device 100 that allows the first liquid to flow, and a second liquid. A second liquid supply device 200 to be flowed and a control device 300 are provided.

(Refrigeration equipment)
The refrigeration apparatus 10 includes a refrigeration circuit 16 in which the compressor 11, the condenser 12, the first expansion valve 13 and the first evaporator 14 are connected by piping 15 in this order so as to circulate the heat medium, and an injection circuit 17 , And parallel piping 18.

The injection circuit 17 branches from the downstream side of the compressor 11 and the upstream side of the condenser 12 in the refrigeration circuit 16 and is located downstream of the first expansion valve 13 and upstream of the first evaporator 14. It is connected. The parallel pipe 18 branches from the downstream side of the condenser 12 and the upstream side of the first expansion valve 13 in the refrigeration circuit 16 and is disposed downstream of the first evaporator 14 and upstream of the compressor 11. It is connected.

The parallel pipe 18 is provided with a second expansion valve 23 and a second evaporator 24 in this order, and in the refrigerator 10, the heat medium is a compressor 11, a condenser 12, a second expansion valve 23, and a second evaporation. It also circulates in the order of the vessels 24.

The compressor 11 compresses the heat medium in the low temperature and low pressure gaseous state, and supplies the compressed heat medium to the condenser 12 as a high temperature and high pressure gaseous state. The condenser 12 cools and condenses the heat medium compressed by the compressor 11 with cooling water, and supplies it to the first expansion valve 13 and the second expansion valve 23 as a low temperature and high pressure liquid state. ing.

Water may be used as the cooling water for the condenser 12, or another refrigerant may be used. FIG. 1 shows a cooling water pipe 31 which allows the cooling water supplied to the condenser 12 to flow and discharges the cooling water flowing out of the condenser 12. The cooling water in the cooling water pipe 31 flows by a pump (not shown) and flows into the condenser 12 to exchange heat with the heat medium, thereby cooling the heat medium.

The first expansion valve 13 decompresses the pressure of the heat medium supplied from the condenser 12 by expansion, and supplies it to the first evaporator 14 as a low-temperature, low-pressure gas-liquid mixture state. The first evaporator 14 cools the first liquid by the heat medium by heat exchange between the supplied heat medium and the first liquid flowing through the first liquid supply device 100. .

The heat medium having exchanged heat with the first liquid is ideally in the state of a low temperature and low pressure gas, flows out of the first evaporator 14 and is compressed again by the compressor 11. In the present embodiment, the first expansion valve 13 is a mechanical automatic expansion valve, and the opening degree of the first expansion valve 13 is automatically made according to the temperature of the heat medium flowing out of the first evaporator 14. It is supposed to be adjusted.

Specifically, the opening degree of the first expansion valve 13 is automatically adjusted so that the liquid back to the compressor 11 is prevented. In the present embodiment, the first expansion valve 13 is a mechanical automatic expansion valve, but the first expansion valve 13 may be an electronic expansion valve whose opening degree can be arbitrarily adjusted.

On the other hand, the second expansion valve 23 is also decompressed by expanding the heat medium supplied from the condenser 12 through the parallel pipe 18 and supplied to the second evaporator 24 as a low temperature, low pressure gas-liquid mixed state Do. The second evaporator 24 is configured to cool the second liquid by the heat medium by exchanging heat between the supplied heat medium and the second liquid through which the second liquid supply device 200 flows. .

The heat medium having exchanged heat with the second liquid is ideally in the form of a low-temperature and low-pressure gas, which flows out of the second evaporator 24 and is compressed again by the compressor 11. In the present embodiment, the second expansion valve 23 is also a mechanical automatic expansion valve, and the degree of opening of the second expansion valve 23 is automatically in accordance with the temperature of the heat medium flowing out of the second evaporator 24. It is supposed to be adjusted.

That is, the opening degree of the second expansion valve 23 is also automatically adjusted so that the liquid back to the compressor 11 is prevented. The second expansion valve 23 may also be an electronic expansion valve whose opening degree can be arbitrarily adjusted.

On the other hand, the injection circuit 17 passes from the downstream side of the compressor 11 and the upstream side of the condenser 12 in the refrigeration circuit 16 to the downstream side of the first expansion valve 13 and the upstream side of the first evaporator 14. A flow control valve 17A is provided to control the flow rate of the high temperature and high pressure heat medium to be flowed.

Thus, the injection circuit 17 adjusts the opening of the flow control valve 17A to flow the heat medium in the high temperature and high pressure gas state flowing out of the compressor 11 out of the first expansion valve 13 and mix the low temperature and low pressure gas / liquid mixture. The heat medium of the state can be mixed so that the flow rate can be adjusted. The flow rate adjustment valve 17A is an electronic expansion valve, and the opening degree thereof is adjusted by the control device 300.

(First liquid supply device)
Next, the first liquid supply device 100 will be described. The first liquid supply device 100 is a discharge type liquid supply device that releases the first liquid supplied from the liquid supply source 120 after temperature adjustment, and is provided to the first evaporator 14 of the refrigeration system 10 and itself. After the temperature of the first liquid is adjusted by a heater 104 described later, the first liquid is discharged toward the first temperature controlled object 121.

The first liquid supply device 100 includes a first side liquid flow path 101 having an upstream end 101A and a downstream end 101B, and receives the first liquid from the liquid supply source 120 at the upstream end 101A, It is comprised so that the liquid of 1 may be discharge | released toward the 1st temperature control target object 121 from downstream end part 101B.

In the first side liquid flow path 101, the pump integrated tank 102, the cooled portion 103 connected to the first evaporator 14, and the heater 104 described above, in order from the upstream side (the liquid supply source 120 side); A filter 105, a regulator 106, and a discharge pressure sensor 107 are provided.

The pump integrated tank 102 has a tank main body 102A for storing the first liquid, and an immersion type pump 102B provided in the tank main body 102A, and the first liquid is driven by driving the pump 102B. Is drawn from the liquid supply source 120 into the tank body 102A, and the first liquid stored in the tank body 102A is made to flow to the cooled portion 103 side.

In the present embodiment, the pump 102B is an immersion type disposed in the tank main body 102A, but the pump 102B is a non-immersion type pump provided in the middle of the pipe constituting the first side liquid flow path 101. It may be

The cooled portion 103 is connected to the first evaporator 14, and the first liquid is cooled by the first evaporator 14 when flowing through the cooled portion 103. Here, the first evaporator 14 in the present embodiment is composed of heat exchangers of two different types capable of flowing, specifically, plate heat exchangers.

In this case, the first evaporator 14 is provided with two flow paths through which two types of fluid can flow, the heat medium flows through one flow path, and the first liquid flows through the other flow path. Flow through. Strictly speaking, the above-described cooled portion 103 in the present embodiment corresponds to the other flow path in the first evaporator 14 through which the first liquid flows.

Subsequently, the heater 104 is, for example, an electric heater, and can heat the first liquid flowing therethrough. The heating capacity of the heater 104 is adjusted by the controller 300.

Further, the filter 105 is provided to capture foreign matter contained in the first liquid. The regulator 106 is provided to maintain the pressure of the first liquid discharged from the downstream end 101 B at a constant value, and the discharge pressure sensor 107 detects the pressure of the first liquid having passed through the regulator 106. Provided in

In the liquid temperature control apparatus 1 according to the present embodiment, as an example, the liquid supply source 120 is a tap water, the first liquid is tap water, and strictly speaking, pure water generated from tap water, (1) It is assumed that the temperature controlled object 121 is a work to be subjected to precision processing, and is used under the condition that the work and its surrounding area are temperature-controlled and cleaned with pure water.

In this case, if the first liquid contains foreign matter or the pressure of the first liquid supplied to the workpiece becomes larger than a predetermined pressure, the processing accuracy of the workpiece to be subjected to precision processing is lowered. There is a risk. Therefore, in the present embodiment, the filter 105, the regulator 106, and the discharge pressure sensor 107 described above are provided.

The discharge pressure sensor 107 may be configured to transmit information on the detected pressure of the first liquid to the control device 300. In this case, the control device 300 may notify a warning when the detected pressure is out of the allowable range.

Further, the first liquid supply device 100 according to the present embodiment is branched from the downstream side of the heater 104 in the first side liquid flow path 101 and the upstream side of the filter 105, and the tank body of the pump integrated tank 102. It has a first side bypass flow passage 110 connected to 102A. The first side bypass flow passage 110 is provided with a relief valve 110A that opens and closes according to the pressure of the first liquid.

When the regulator 106 operates to maintain the pressure of the first liquid at a constant value, the pressure of the first liquid upstream of the regulator 106 may increase. In this case, in the present embodiment, the relief valve 110A is opened and the first liquid flows into the tank body 102A, whereby the pressure of the first liquid on the upstream side of the regulator 106 is reduced, which is desired. Adjusted to the state. This stabilizes the operation of the regulator 106 and further stabilizes the pressure of the first liquid to be discharged.

Further, the first liquid supply apparatus 100 in the present embodiment detects the temperature of the first liquid flowing downstream of the portion to be cooled 103 in the first side liquid flow path 101 and on the upstream side of the heater 104. A temperature control sensor for detecting the temperature of the first liquid flowing downstream of the heater 104 in the first side liquid flow path 101 and on the upstream side of the filter 105. And.

The freezing control temperature sensor 111 and the first side heating control temperature sensor 112 are configured to transmit the detected temperature of the first liquid to the control device 300.

(Second liquid supply device)
Next, the second liquid supply device 200 will be described. The second liquid supply device 200 is a circulation type liquid supply device that circulates the second liquid, and heats the second liquid by the second evaporator 24 of the refrigeration system 10 and a heater 204 described later provided in the second liquid supply device 200. After adjustment, the second liquid is supplied to the second temperature controlled object 221 side.

The second liquid supply apparatus 200 includes a second side liquid flow path 201 having an upstream end 201A and a downstream end 201B, and the upstream end 201A and the downstream end 201B are directly connected to the second temperature controlled object 221, respectively. Connected so as to circulate the second liquid.

The second side liquid flow path 201 is provided with a cooled portion 203 connected to the second evaporator 24, a tank 202, the above-described heater 204, and a pump 205. The second liquid flows through the unit to be cooled 203, the tank 202, the heater 204, and the pump 205 in this order by driving the pump 205, and after flowing out from the pump 205, is supplied to the second temperature control target 221 side. It is supposed to be

The cooled portion 203 is connected to the second evaporator 24, and the second liquid is cooled by the second evaporator 24 when flowing through the cooled portion 203. Here, the second evaporator 24 in the present embodiment is composed of heat exchangers of two different types capable of flowing, specifically, plate heat exchangers.

In this case, the second evaporator 24 is provided with two flow paths through which two types of fluid can flow, the heat medium flows through one flow path, and the second liquid flows through the other flow path. Flow through. Strictly speaking, the portion to be cooled 203 referred to in the present embodiment corresponds to the other flow path in the second evaporator 24 through which the second liquid flows.

Subsequently, the tank 202 stores the second liquid flowing out of the portion to be cooled 203 and is in communication with the heater 204. The heater 204 is, for example, an electric heater, and can heat the second liquid flowing out of the tank 202 and flowing therethrough. The heating capacity of the heater 204 is adjusted by the controller 300.

The pump 205 is a non-immersion type, and is provided in the middle of the pipe that constitutes the second side liquid flow path 201. In the present embodiment, the pump 205 is provided downstream of the heater 204 and upstream of the downstream end portion 201B, but the arrangement position of the pump 205 is not particularly limited.

Here, in the present embodiment, as described above, in the liquid temperature adjusting device 1 according to the present embodiment, the liquid supply source 120 is a water supply, the first liquid is pure water, and the first temperature control target is Although it is assumed that the object 121 is a workpiece to be subjected to precision processing, and the workpiece and its surrounding area are conditioned and cleaned with pure water, it is assumed to be used. The two-liquid supply apparatus 200 is assumed to be used to cool a drive unit (such as a motor) of a cutting tool that processes the workpiece.

In this case, the single liquid temperature control device 1 can economically cool the work to be cut by the cutting tool and the peripheral area thereof, and can cool the driving unit of the cutting tool.

In the present embodiment, although the upstream end 201A and the downstream end 201B are directly connected to the second temperature controlled object 221, the upstream end 201A and the downstream end 201B are separate pipes. It may be indirectly connected to the second temperature controlled object 221 via Alternatively, the upstream end portion 201A and the downstream end portion 201B are connected to the temperature control unit included in the second liquid supply device 200, and the second temperature control target separate from the liquid temperature control device 1 via the temperature control unit. The temperature of the object 221 may be adjusted.

Further, the second liquid supply device 200 in the present embodiment is branched from the downstream side of the pump 205 in the second side liquid flow path 201 and the upstream side of the downstream end portion 201B, and the downstream side of the upstream end portion 201A. A second side bypass flow passage 210 is connected to the side on the upstream side of the portion to be cooled 203. The second side bypass flow passage 210 is provided with a relief valve 210A that opens and closes according to the pressure of the second liquid.

In the present embodiment, when the pressure of the second liquid flowing out of the pump 205 rises, the relief valve 210A is opened and the second liquid is on the downstream side of the upstream end portion 201A in the second side liquid flow path 201. And flows into the upstream portion of the cooled portion 203. Thereby, the pressure of the second liquid is adjusted to the desired state.

Further, the second liquid supply device 200 in the present embodiment detects the temperature of the second liquid flowing downstream of the pump 205 in the second side liquid flow path 201 and upstream of the downstream end portion 201B. A second side heating control temperature sensor 212 is provided. The second side heating control temperature sensor 212 transmits the detected temperature of the second liquid to the control device 300.

(Control device)
Next, the control device 300 will be described. The control device 300 is electrically connected to the refrigeration control temperature sensor 111, the first side heating control temperature sensor 112, and the second side heating control temperature sensor 212, while the flow control valve 17A, the heater 104. And electrically connected to the heater 204.

The control device 300 sets the opening degree of the flow rate control valve 17A according to the difference between the temperature of the first liquid detected by the refrigeration control temperature sensor 111 and the target temperature after cooling of the first liquid set in advance. By adjusting, the flow rate of the high-temperature heat medium supplied to the downstream portion of the first expansion valve 13 and the upstream portion of the first evaporator 14 is adjusted. As a result, it is possible to obtain, in the first evaporator 14, a refrigeration capacity for setting the temperature of the first liquid detected by the refrigeration control temperature sensor 111 to the target temperature after cooling.

Further, the control device 300 controls the temperature of the heater 104 according to the difference between the temperature of the first liquid detected by the first side heating control temperature sensor 112 and the target temperature after heating of the first liquid set in advance. It is designed to adjust the heating capacity. As a result, it is possible to supply the first liquid of a desired temperature to the first temperature controlled object 121.

Further, the control device 300 controls the temperature of the heater 204 according to the difference between the temperature of the second liquid detected by the second side heating control temperature sensor 212 and the target temperature after heating of the second liquid set in advance. It is designed to adjust the heating capacity. As a result, it is possible to supply the second liquid at a desired temperature to the second temperature controlled object 221.

(Operation)
Next, the operation of the liquid temperature adjusting device 1 according to the present embodiment will be described.

When the temperature control operation by the liquid temperature control device 1 is started, first, the compressor 11 of the refrigeration system 10 is driven, and the pump 102B of the first liquid supply device 100 is driven, and the second liquid supply is performed. The pump 205 of the device 200 is driven.

Thereby, in the freezing apparatus 10, the heat medium circulates. In the first liquid supply device 100, the first liquid is drawn from the liquid supply source 120 into the tank main body 102A, and the first liquid stored in the tank main body 102A is caused to flow to the cooled portion 103 side. It is released toward the temperature controlled object 121. Further, in the second liquid supply device 200, the second liquid flows through the portion to be cooled 203, the tank 202, the heater 204, and the pump 205 in this order, and then flows out from the pump 205. , And then circulate to the cooled portion 203.

As described above, when the

respective devices

10, 100, and 200 are operated, in the refrigeration system 10, the heat medium condensed in the condenser 12 is branched into the first expansion valve 13 and the second expansion valve 23, and flows in. Each of the branched heat transfer media is expanded into a low temperature, low pressure gas-liquid mixed state, and flows into the first evaporator 14 and the second evaporator 24. Then, the first evaporator 14 cools the first liquid by the heat medium by heat exchange between the supplied heat medium and the first liquid which the first liquid supply device 100 allows to flow, The evaporator 24 cools the second liquid by the heat medium by heat exchange between the supplied heat medium and the second liquid through which the second liquid supply device 200 flows.

Here, in the present embodiment, the injection circuit 17 adjusts the opening degree of the flow rate control valve 17A so that the heat medium in the high temperature and high pressure gas state flowing out of the compressor 11 flows out from the first expansion valve 13 And, it is possible to mix the heat medium in the low pressure gas-liquid mixed state so that the flow rate can be adjusted. Thereby, even if the first liquid flowing into the portion to be cooled 103 largely fluctuates due to the temperature fluctuation of the first liquid in the liquid supply source 120, for example, the high temperature and high pressure heat medium is made to flow It is possible to quickly obtain the refrigeration capacity of the first evaporator 14 for adjusting the first liquid to a desired temperature by switching the flow rate or by adjusting the inflow of the heat medium. It becomes. Thus, the temperature of the first liquid can be adjusted to a desired temperature, and the first temperature controlled object 121 can be quickly supplied.

As described above, in the present embodiment, the high-temperature heat medium flowing out of the compressor 11 is injected downstream of the first expansion valve 13 and upstream of the first evaporator 14 via the injection circuit 17. The flow rate of the heat medium supplied at this time can be adjusted by the flow control valve 17A. This makes it possible to adjust the refrigeration capacity output in the first evaporator 14 in a wide range. In addition, the temperature of the heat medium flowing into the first evaporator 14 can be changed by adjusting the mixing ratio of the high temperature heat medium to the low temperature heat medium, and the first evaporation can be performed by increasing the mixing amount of the high temperature heat medium. The temperature of the heat transfer medium flowing into the vessel 14 rises rapidly, and the temperature of the heat transfer medium flowing into the first evaporator 14 drops rapidly by reducing the mixing amount of the high temperature heat transfer medium. By adjusting the temperature of the heat medium and adjusting the refrigeration capacity without adjusting the rotation speed of the compressor 11, it is possible to obtain the desired refrigeration capacity in a quick and accurate manner. In addition, since the adjustment of the refrigeration capacity is performed using a part of the heat medium circulating in the refrigeration circuit 16 instead of the additional power supply, the manufacturing cost and the running cost can be suppressed.

Therefore, even if the temperature of the liquid (first liquid) introduced to adjust the temperature can fluctuate significantly, the temperature of this liquid (first liquid) can be rapidly determined while suppressing manufacturing costs and running costs. The temperature can be adjusted to the target temperature with high accuracy. Specifically, for example, when the temperature fluctuation range of the first liquid is 15 ° C. to 30 ° C. and it is required to control the temperature of the first liquid to a target temperature in the range of 20 ° C. to 27 ° C. The liquid temperature control device 1 according to the present embodiment can be usefully used.

Further, in the present embodiment, the first liquid supply device 100 is a discharge type liquid supply device that releases the first liquid supplied from the liquid supply source 120 after temperature control. In addition, the liquid temperature control device 1 according to the present embodiment is used under the use condition that the liquid supply source 120 is a tap water and the first liquid is tap water, particularly pure water generated from tap water. It assumes that.

When a discharge-type liquid supply device is used in this kind of liquid temperature control device, the amount of liquid released from the liquid supply device tends to be large, and in many cases, tap water supplied from the water as a liquid Water stored in large tanks is used. At this time, the temperature of the tap water and the water stored in the large tank is not usually adjusted before being drawn into the liquid supply device. Therefore, the liquid temperature adjustment device 1 according to the present embodiment is used under the assumed use conditions described above, thereby suppressing the temperature of the first liquid while suppressing the manufacturing cost and the running cost particularly effectively. The temperature can be adjusted to the target temperature quickly and accurately. The liquid temperature adjustment device 1 according to the present embodiment can be usefully used even when the liquid supply source 120 is a tank not having a device for adjusting the temperature of the first liquid. .

Further, the refrigeration apparatus 10 branches from the downstream side of the condenser 12 and the upstream side of the first expansion valve 13 in the refrigeration circuit 16, and is downstream of the first evaporator 14 and upstream of the compressor 11. The parallel piping 18 further includes a parallel piping 18 connected to the part, and the parallel piping 18 is provided with a second expansion valve 23 and a second evaporator 24 in this order. Thus, the second evaporator 24 can control the temperature of a fluid different from the first liquid, that is, a liquid or gas different from the first liquid. Thereby, a plurality of temperature control objects can be efficiently temperature-controlled using the single refrigeration apparatus 10.

In particular, in the present embodiment, the liquid temperature control device 1 includes the second liquid supply device 200 that allows the second liquid to flow, and the second liquid is cooled by the second evaporator 24. Thereby, two types of liquids can be temperature-controlled efficiently using the single freezing apparatus 10.

Specifically, in the present embodiment, it is assumed that the first liquid supplied by the first liquid supply device 100 has a large temperature fluctuation when introduced for temperature control, and the second liquid It is assumed that the supply apparatus 200 is a circulation type, and the temperature fluctuation of the second liquid circulated after the temperature control of the temperature control target tends to be small. Therefore, by cooling the first liquid by the first evaporator 14 and cooling the second liquid by the second evaporator 24, desired temperature control by the two liquids can be performed while effectively suppressing the manufacturing cost. Is realized.

Further, the second liquid supply device 200 in the present embodiment has a heater 204 for heating the second liquid, whereby the high temperature heat medium supplied from the injection circuit 17 allows the second evaporator 24 to receive the second liquid. Even if a situation occurs in which the refrigeration capacity decreases with respect to the desired value, the desired temperature control state for the second liquid can be maintained by reducing the heating capacity of the heater 204 to compensate for this reduction. It becomes possible. In addition, in order to realize such control, it is necessary to make the heater 204 always output a predetermined heating capacity.

Second Embodiment
Next, a second embodiment will be described with reference to FIG. The same code | symbol is attached | subjected to the part similar to 1st Embodiment among the component parts in this Embodiment, and the description is abbreviate | omitted.

As shown in FIG. 2, the liquid temperature adjustment device 2 according to the second embodiment includes the parallel piping 18, the second expansion valve 23 and the second evaporator 24 described in the first embodiment. Absent.

Third Embodiment
Next, a third embodiment will be described with reference to FIG. The same code | symbol is attached | subjected to the part similar to 1st and 2nd embodiment among the component parts in this Embodiment, and the description is abbreviate | omitted.

As shown in FIG. 3, the liquid temperature adjusting device 3 according to the third embodiment includes a plurality of, specifically two, parallel pipes 18 described in the first embodiment, and one of the parallel pipes 18 is in parallel. The pipe 18 is provided with a second expansion valve 23 and a second evaporator 24, and the other parallel pipe 18 is provided with a third expansion valve 33 and a third evaporator 34. The number of evaporators provided in parallel to the first evaporator 14 may be four or more.

Claims

A refrigeration circuit in which a compressor, a condenser, a first expansion valve, and a first evaporator are connected by piping in this order to circulate a heat medium, and the condenser downstream of the compressor in the refrigeration circuit A refrigeration system having an injection circuit branched from the upstream side of the first expansion valve and connected to the downstream side of the first expansion valve and the upstream side of the first evaporator;
A first liquid supply device for passing the first liquid through;
The injection circuit has a flow control valve that controls the flow rate of the heat medium to be flowed.
A liquid temperature control device, comprising: cooling the first liquid flowed by the first liquid supply device by the first evaporator.
The liquid temperature control device according to claim 1, wherein the first liquid supply device is a discharge type liquid supply device that releases the first liquid supplied from a liquid supply source after temperature adjustment. .
The liquid supply source is a water supply, and the first liquid is tap water, or the liquid supply source stores the first liquid and regulates the temperature of the first liquid stored. The liquid temperature control device according to claim 2, wherein the liquid temperature control device is a tank having no device.
The liquid temperature control device according to claim 3, wherein the first liquid is pure water generated from tap water.
The refrigeration apparatus branches from the downstream side of the condenser and the upstream side of the first expansion valve in the refrigeration circuit, and is downstream of the first evaporator and upstream of the compressor. It further has parallel piping connected,
The parallel piping is provided with a second expansion valve and a second evaporator in this order,
The liquid temperature according to claim 1, wherein, in the refrigeration unit, the heat medium is also circulated in the order of the compressor, the condenser, the second expansion valve, and the second evaporator. Adjuster.
Further comprising a second liquid supply device for passing the second liquid,
The liquid temperature control device according to claim 5, wherein the second liquid supplied by the second liquid supply device is cooled by the second evaporator.
The liquid temperature control device according to claim 6, wherein the second liquid supply device is a circulating liquid supply device that circulates the second liquid.
The said 2nd liquid supply apparatus has a heater which heats the said 2nd liquid, The liquid temperature control apparatus of Claim 6 or 7 characterized by the above-mentioned.
A temperature control method using a liquid temperature control device,
The liquid temperature controller is
A refrigeration circuit in which a compressor, a condenser, a first expansion valve, and a first evaporator are connected by piping in this order to circulate a heat medium, and the condenser downstream of the compressor in the refrigeration circuit A refrigeration system having an injection circuit branched from the upstream side of the first expansion valve and connected to the downstream side of the first expansion valve and the upstream side of the first evaporator;
A first liquid supply device through which the first liquid flows;
A second liquid supply device for passing a second liquid,
The refrigeration apparatus branches from the downstream side of the condenser and the upstream side of the first expansion valve in the refrigeration circuit, and is downstream of the first evaporator and upstream of the compressor. With parallel piping connected,
The parallel piping is provided with a second expansion valve and a second evaporator in this order,
In the refrigeration apparatus, the heat medium is also circulated in the order of the compressor, the condenser, the second expansion valve, and the second evaporator.
The injection circuit has a flow control valve that controls the flow rate of the heat medium to be flowed.
The first liquid supply device is a discharge type liquid supply device that releases the first liquid supplied from a liquid supply source after temperature control,
The second liquid supply device is a circulation type liquid supply device that circulates the second liquid,
The first liquid supplied by the first liquid supply device is cooled by the first evaporator, and the second liquid supplied by the second liquid supply device is cooled by the second evaporator. It has become
Cooling and cleaning the workpiece to be cut by a cutting tool and its surrounding area with the first liquid cooled by the first evaporator;
Cooling the drive unit of the cutting tool with the second liquid cooled by the second evaporator. A temperature control method using a liquid temperature control device, comprising: